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Pero_K's avatar
Pero_K
Icon for New Contributor rankNew Contributor
1 year ago

Current consumption during the secured key and encrypted data programming

Hello, on my Arria 10 GX board, I am experiencing a strange issue: during the secure key programming (volatile) or during the encrypted configuration data programming, the voltage at IO supply (1.8V...
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Farabi's avatar
Farabi
Icon for Regular Contributor rankRegular Contributor
1 year ago

Hello,


That means you had a voltage ripple, and eventually the ripple exceed the max value of operating condition that triggers the device reset(you observed as device shutdown).

Please review your power delivery design for your PCB and make sure the decoupling capacitors are sufficient to supply the current required during ramp up and configuration.


Please use PDN tool to determine the power needed and how many decoupling required in your design.


regards,

Farabi


Pero_K's avatar
Pero_K
Icon for New Contributor rankNew Contributor
1 year ago

Hello Farabi, thanks for the reply.

I'm not sure if you caught my issue here: the device powers up and configures properly, which implies my PDN is good. And yes, I used Intel's PDN tool to estimate it. Later in design, I used PI simulations to verify that my caps and planes are up to the job.

The issue arises when the secure programming is used. For some reason, the current consumption during secure programming is higher than using "normal" programming. Do you know why is that, and how can it be mitigated?

best regards,

P.